Ключевые слова: bridge, chain, conduit, construction, domestic, duct, equipment, gas, heat, heating, heating main, hot, housing, hydropower, industrial, industry, insulated, line, main, manifold, metal, neighborhood, outside, overground, pipe, pipeline, pipelines, pipes, piping, security, service, sky, steam, stream, supply, technology, transfer, transit, transmission, transporting, tubing, water, winter,